Hadith Collections are compilations of sayings, actions, and approvals of the Prophet Muhammad. They serve as important sources of guidance for Muslims, complementing the Quran in matters of faith, law, and ethics. Each collection is categorized based on the reliability of the narrators and the authenticity of the reports. Some of the most well-known Hadith Collections include Sahih Bukhari and Sahih Muslim, which are considered highly authentic. Other notable collections are Sunan Abu Dawood and Jami` at-Tirmidhi. Scholars study these texts to understand the teachings of Islam and to derive legal rulings.